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• Picking the right gpu for ffmpeg decoding/encoding with nvidia/cuda

  14 avril 2020, par Reza Mir

  I am writing code using ffmpeg/nvidia/cuda library to decode and encode some video. I am trying to pick one specific GPU for decoding/encoding among some existing GPUs installed on the system. Here is the list of existing GPUs :

  



   nvidia-smi 
Tue Apr 14 00:14:59 2020       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 440.64.00    Driver Version: 440.64.00    CUDA Version: 10.2     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|===============================+======================+======================|
|   0  GeForce RTX 208...  On   | 00000000:1A:00.0 Off |                  N/A |
| 41%   33C    P8    20W / 260W |      0MiB / 11019MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
|   1  GeForce GTX 108...  On   | 00000000:1B:00.0 Off |                  N/A |
| 41%   65C    P2   182W / 250W |   7167MiB / 11178MiB |     53%      Default |
+-------------------------------+----------------------+----------------------+
|   2  GeForce GTX 108...  On   | 00000000:1E:00.0 Off |                  N/A |
| 14%   55C    P2    61W / 250W |   1943MiB / 11178MiB |     26%      Default |
+-------------------------------+----------------------+----------------------+
|   3  Quadro P5000        On   | 00000000:3D:00.0 Off |                  Off |
| 26%   33C    P8     6W / 180W |      1MiB / 16278MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
|   4  TITAN RTX           On   | 00000000:3E:00.0 Off |                  N/A |
| 41%   38C    P0    72W / 280W |      0MiB / 24220MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
|   5  TITAN RTX           On   | 00000000:41:00.0 Off |                  N/A |
| 40%   32C    P8    14W / 280W |      0MiB / 24220MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+



  



  I would like to pick GPU #3 in my code and use it for decoding. I am using h264_nvenc and h264_cuvid as encoder and decoder in my program and setting the options of decoder/encoder using the following code :

  



  av_opt_set(decoder_context->priv_data, "gpu", "Quadro P5000", 0);


  



  But this code doesn't pick Quadro GPU for decoding/encoding. Instead, it always goes to GPU #4 in my test :

  



  nvidia-smi pmon | grep tx
    4      20096     C    22     3    44    16   tx            
    4      20096     C    26     4    49    17   tx            
    4      20096     C    25     4    49    17   tx     


  


• Failing to push mpeg dash segment to webdav server using method PUT

  18 avril 2020, par Safwan Sada

  I am trying to push mpeg dash segments to webdav server.

  



  Here is the command :

  



  ffmpeg -loglevel verbose -re -i /home/SAFWAN/URI.mp4 -codec copy -sc_threshold 0 -b_strategy 0 -use_timeline 0 -use_template 1 -window_size 10 -init_seg_name init-$RepresentationID$.mp4 -strict -2 -f dash -segment_list_flags +live -min_seg_duration 2000000 -method PUT http://192.168.22.112/webdav/SAFWAN5/manifest.mpd

  



  But I am able to push hls segments using sample ffmpeg command :
ffmpeg -loglevel verbose -re -i /home/SAFWAN/URI.mp4 -codec copy -method PUT -f hls http://192.168.22.112/webdav/SAFWAN5/master.m3u8

  



  Here is the apache2 access log :
183.82.0.170 - - [18/Apr/2020:10:32:28 -0400] "POST /webdav/SAFWAN5/manifest.mpd HTTP/1.1" 200 292 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:38 -0400] "POST /webdav/SAFWAN5/chunk-stream0-00004.m4s HTTP/1.1" 404 498 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:38 -0400] "POST /webdav/SAFWAN5/chunk-stream1-00004.m4s HTTP/1.1" 404 498 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:39 -0400] "POST /webdav/SAFWAN5/manifest.mpd HTTP/1.1" 200 292 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:48 -0400] "POST /webdav/SAFWAN5/chunk-stream0-00005.m4s HTTP/1.1" 404 498 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:48 -0400] "POST /webdav/SAFWAN5/chunk-stream1-00005.m4s HTTP/1.1" 404 498 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:49 -0400] "POST /webdav/SAFWAN5/manifest.mpd HTTP/1.1" 200 292 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:53 -0400] "POST /webdav/SAFWAN5/chunk-stream0-00006.m4s HTTP/1.1" 404 498 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:53 -0400] "POST /webdav/SAFWAN5/chunk-stream1-00006.m4s HTTP/1.1" 404 498 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:53 -0400] "POST /webdav/SAFWAN5/manifest.mpd HTTP/1.1" 200 292 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:57 -0400] "POST /webdav/SAFWAN5/chunk-stream0-00007.m4s HTTP/1.1" 404 498 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:57 -0400] "POST /webdav/SAFWAN5/chunk-stream1-00007.m4s HTTP/1.1" 404 498 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:32:57 -0400] "POST /webdav/SAFWAN5/manifest.mpd HTTP/1.1" 200 292 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:33:00 -0400] "POST /webdav/SAFWAN5/chunk-stream0-00008.m4s HTTP/1.1" 404 498 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:33:00 -0400] "POST /webdav/SAFWAN5/chunk-stream1-00008.m4s HTTP/1.1" 404 498 "-" "Lavf/57.83.100"
183.82.0.170 - - [18/Apr/2020:10:33:01 -0400] "POST /webdav/SAFWAN5/manifest.mpd HTTP/1.1" 200 292 "-" "Lavf/57.83.100"

  



  Please let me know why the dash segments is failing to push to webdav server ?

  


• FFmpeg concatenate video and add watermark

  18 avril 2020, par user7356972

  I have command to overlay two video one on other.

  



  ffmpeg -i input.mp4 -vf "movie= overlay.mov [a]; [1][a]scale2ref[2nd][ref];[2nd][ref]overlay=0:0 [c]"  output.mp4 


  



  Now I want to add water watermark and concatenate a new video append.mov in above command. I have found a command to add watermark.

  



  ffmpeg -i output.mp4 -i watermark.png -filter_complex "overlay=10:10" outputwatermark.mp4


  



  But I want to merge both the command and also need to concatenate append.mov to output.mp4.

  



  Also above overlay two video command takes too long time to process if video size is large. Any suggestion on that(should not affect quality of video) ?

  



  I tried following command to concatenate video.

  



  ffmpeg -i abc.mp4 -i ../input/overlay2.mov append.mp4


  



  The video was not concatenate, below is the output.

  



  ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.17)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'abc.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:37.40, start: 0.000000, bitrate: 474 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 960x540 [SAR 3:4 DAR 4:3], 324 kb/s, 1k fps, 1k tbr, 16k tbn, 2k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 69 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '../input/overlay2.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2020-03-27T16:32:23.000000Z
  Duration: 00:00:37.44, start: 0.000000, bitrate: 3519 kb/s
    Stream #1:0(eng): Video: qtrle (rle  / 0x20656C72), argb(progressive), 640x352, 3295 kb/s, SAR 1:1 DAR 20:11, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2020-03-27T16:32:23.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Animation
      timecode        : 00:00:00:00
    Stream #1:1(eng): Data: none (tmcd / 0x64636D74) (default)
    Metadata:
      creation_time   : 2020-03-27T16:32:23.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 00:00:00:00
File 'append.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x7ff35a012200] using SAR=3/4
[libx264 @ 0x7ff35a012200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7ff35a012200] profile High, level 5.2
[libx264 @ 0x7ff35a012200] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'append.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
    Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 960x540 [SAR 3:4 DAR 4:3], q=-1--1, 1k fps, 16k tbn, 1k tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 69 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc58.54.100 aac
frame=37399 fps=378 q=-1.0 Lsize=    2138kB time=00:00:37.39 bitrate= 468.4kbits/s speed=0.378x    
video:1454kB audio:221kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 27.624002%
[libx264 @ 0x7ff35a012200] frame I:150   Avg QP:11.47  size:  1655
[libx264 @ 0x7ff35a012200] frame P:9423  Avg QP:14.43  size:    52
[libx264 @ 0x7ff35a012200] frame B:27826 Avg QP:17.67  size:    27
[libx264 @ 0x7ff35a012200] consecutive B-frames:  0.8%  0.0%  0.0% 99.2%
[libx264 @ 0x7ff35a012200] mb I  I16..4: 94.0%  4.3%  1.7%
[libx264 @ 0x7ff35a012200] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.1%  0.0%  0.0%  0.0%  0.0%    skip:99.8%
[libx264 @ 0x7ff35a012200] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.1%  0.0%  0.0%  direct: 0.0%  skip:99.9%  L0:54.5% L1:45.5% BI: 0.1%
[libx264 @ 0x7ff35a012200] 8x8 transform intra:4.8% inter:84.4%
[libx264 @ 0x7ff35a012200] coded y,uvDC,uvAC intra: 1.6% 2.3% 2.0% inter: 0.0% 0.0% 0.0%
[libx264 @ 0x7ff35a012200] i16 v,h,dc,p: 96%  0%  3%  0%
[libx264 @ 0x7ff35a012200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 58%  9% 28%  1%  1%  1%  1%  1%  1%
[libx264 @ 0x7ff35a012200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 38% 22% 15%  4%  4%  5%  5%  4%  4%
[libx264 @ 0x7ff35a012200] i8c dc,h,v,p: 97%  1%  1%  0%
[libx264 @ 0x7ff35a012200] Weighted P-Frames: Y:1.9% UV:1.9%
[libx264 @ 0x7ff35a012200] ref P L0: 86.3%  8.4%  4.5%  0.8%  0.0%
[libx264 @ 0x7ff35a012200] ref B L0: 75.4% 24.0%  0.5%
[libx264 @ 0x7ff35a012200] ref B L1: 98.1%  1.9%
[libx264 @ 0x7ff35a012200] kb/s:318.42
[aac @ 0x7ff35a013a00] Qavg: 152.336